7019 ACDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7019 ACDGA/HCP4A
Basic Information
System of measurement
Metric
Weight
1 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
95 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
145 mm
Outside diameter tolerance
-0.004mm to 0
Width
24 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
17122 lbf
Radial static load rating
17212 lbf
Limiting speed
15 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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In Stock
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7019 ACDGA/HCP4A Bearing Product Overview & Core Advantages
The 7019 ACDGA/P4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. Designed to accommodate combined loads (simultaneous radial and axial loads), this bearing features a 25° contact angle optimized for high axial load capacity. Its P4A tolerance class ensures ultra-precise running accuracy, while the ceramic ball construction and phenolic cage contribute to superior high-speed capabilities and reduced rotational mass. This configuration delivers outstanding rigidity and operational reliability in precision machinery.
7019 ACDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| A | Designates Extra Light preload (Class A), providing minimal internal clearance for high rotational accuracy and rigidity. |
| CDGA | Indicates a Universal Matchable (SU) bearing designed for precise matched arrangement in sets (typically 3 bearings). |
| P4A | Specifies a super-precision tolerance class with enhanced running accuracy and dimensional stability beyond standard P4. |
7019 ACDGA/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The extra light preload (Class A) and P4A tolerance class deliver exceptional system stiffness and minimal runout, critical for maintaining accuracy under load.
- Superior Load Capacity: The 25° contact angle is optimized to handle significant combined radial and axial loads simultaneously.
- Enhanced High-Speed Performance: The combination of lightweight phenolic resin cage and low-density ceramic balls (Si3N4) reduces centrifugal forces, enabling a high limiting speed of 15,000 rpm.
- Universal Matching Capability: Designed as a Universal Matchable (SU) bearing, it can be supplied in pre-matched sets (3 bearings) to achieve optimal preload and performance in multi-bearing arrangements.
7019 ACDGA/HCP4A Bearing Typical Application Areas
This high-precision angular contact bearing is ideally suited for:
- Machine Tool Spindles for CNC machining centers and grinding machines
- High-Frequency Motor Spindles
- Precision Grinding Equipment
- Aerospace & Defense Positioning Systems
- Medical & Laboratory Precision Instruments
